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Total Share-Based Compensation Cost Recognized (Detail)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
USD ($)
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
Dec. 31, 2010
CNY
Dec. 31, 2012
Cost of Sales
USD ($)
Dec. 31, 2012
Cost of Sales
CNY
Dec. 31, 2011
Cost of Sales
CNY
Dec. 31, 2010
Cost of Sales
CNY
Dec. 31, 2012
Selling, General and Administrative Expense
USD ($)
Dec. 31, 2012
Selling, General and Administrative Expense
CNY
Dec. 31, 2011
Selling, General and Administrative Expense
CNY
Dec. 31, 2010
Selling, General and Administrative Expense
CNY
Dec. 31, 2012
Research and Development Expense
USD ($)
Dec. 31, 2012
Research and Development Expense
CNY
Dec. 31, 2011
Research and Development Expense
CNY
Dec. 31, 2010
Research and Development Expense
CNY
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]                                
Share-based compensation $ 34,078 212,309 152,028 93,736 $ 1,622 10,105 7,527 6,302 $ 8,750 54,512 50,012 36,811 $ 23,706 147,692 94,489 50,623
Capitalized as part of internal-used software $ 312 1,944 1,700 226